#include "widget.h"
#include "ui_widget.h"

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);

    ui->listWidget->addItem("C++");
    ui->listWidget->addItem(new QListWidgetItem("Java"));
}

Widget::~Widget()
{
    delete ui;
}


void Widget::on_pushButton_clicked()
{
    ui->listWidget->addItem(new QListWidgetItem(ui->lineEdit->text()));
}

void Widget::on_pushButton_2_clicked()
{
    int row = ui->listWidget->currentRow();
    ui->listWidget->takeItem(row);
}

void Widget::on_listWidget_currentItemChanged(QListWidgetItem *current, QListWidgetItem *previous)
{
    if(current != nullptr)
    {
        qDebug() << "现在选中: " << current->text();
    }

    if(previous != nullptr)
    {
        qDebug() << "之前选中" << previous->text();
    }
}
